poly_int: argument sizes

This patch changes various bits of state related to argument sizes so
that they have type poly_int64 rather than HOST_WIDE_INT.  This includes:

- incoming_args::pops_args and incoming_args::size
- rtl_data::outgoing_args_size
- pending_stack_adjust
- stack_pointer_delta
- stack_usage::pushed_stack_size
- args_size::constant

It also changes TARGET_RETURN_POPS_ARGS so that the size of the
arguments passed in and the size returned by the hook are both
poly_int64s.

2017-12-21  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* target.def (return_pops_args): Treat both the input and output
	sizes as poly_int64s rather than HOST_WIDE_INTS.
	* targhooks.h (default_return_pops_args): Update accordingly.
	* targhooks.c (default_return_pops_args): Likewise.
	* doc/tm.texi: Regenerate.
	* emit-rtl.h (incoming_args): Change pops_args, size and
	outgoing_args_size from int to poly_int64_pod.
	* function.h (expr_status): Change x_pending_stack_adjust and
	x_stack_pointer_delta from int to poly_int64.
	(args_size::constant): Change from HOST_WIDE_INT to poly_int64.
	(ARGS_SIZE_RTX): Update accordingly.
	* calls.c (highest_outgoing_arg_in_use): Change from int to
	unsigned int.
	(stack_usage_watermark, stored_args_watermark): New variables.
	(stack_region_maybe_used_p, mark_stack_region_used): New functions.
	(emit_call_1): Change the stack_size and rounded_stack_size
	parameters from HOST_WIDE_INT to poly_int64.  Track n_popped
	as a poly_int64.
	(save_fixed_argument_area): Check stack_usage_watermark.
	(initialize_argument_information): Change old_pending_adj from
	a HOST_WIDE_INT * to a poly_int64_pod *.
	(compute_argument_block_size): Return the size as a poly_int64
	rather than an int.
	(finalize_must_preallocate): Track polynomial argument sizes.
	(compute_argument_addresses): Likewise.
	(internal_arg_pointer_based_exp): Track polynomial offsets.
	(mem_overlaps_already_clobbered_arg_p): Rename to...
	(mem_might_overlap_already_clobbered_arg_p): ...this and take the
	size as a poly_uint64 rather than an unsigned HOST_WIDE_INT.
	Check stored_args_used_watermark.
	(load_register_parameters): Update accordingly.
	(check_sibcall_argument_overlap_1): Likewise.
	(combine_pending_stack_adjustment_and_call): Take the unadjusted
	args size as a poly_int64 rather than an int.  Return a bool
	indicating whether the optimization was possible and return
	the new adjustment by reference.
	(check_sibcall_argument_overlap): Track polynomail argument sizes.
	Update stored_args_watermark.
	(can_implement_as_sibling_call_p): Handle polynomial argument sizes.
	(expand_call): Likewise.  Maintain stack_usage_watermark and
	stored_args_watermark.  Update calls to
	combine_pending_stack_adjustment_and_call.
	(emit_library_call_value_1): Handle polynomial argument sizes.
	Call stack_region_maybe_used_p and mark_stack_region_used.
	Maintain stack_usage_watermark.
	(store_one_arg): Likewise.  Update call to
	mem_overlaps_already_clobbered_arg_p.
	* config/arm/arm.c (arm_output_function_prologue): Add a cast to
	HOST_WIDE_INT.
	* config/avr/avr.c (avr_outgoing_args_size): Likewise.
	* config/microblaze/microblaze.c (microblaze_function_prologue):
	Likewise.
	* config/cr16/cr16.c (cr16_return_pops_args): Update for new
	TARGET_RETURN_POPS_ARGS interface.
	(cr16_compute_frame, cr16_initial_elimination_offset): Add casts
	to HOST_WIDE_INT.
	* config/ft32/ft32.c (ft32_compute_frame): Likewise.
	* config/i386/i386.c (ix86_return_pops_args): Update for new
	TARGET_RETURN_POPS_ARGS interface.
	(ix86_expand_split_stack_prologue): Add a cast to HOST_WIDE_INT.
	* config/moxie/moxie.c (moxie_compute_frame): Likewise.
	* config/m68k/m68k.c (m68k_return_pops_args): Update for new
	TARGET_RETURN_POPS_ARGS interface.
	* config/vax/vax.c (vax_return_pops_args): Likewise.
	* config/pa/pa.h (STACK_POINTER_OFFSET): Add a cast to poly_int64.
	(EXIT_IGNORE_STACK): Update reference to crtl->outgoing_args_size.
	* config/arm/arm.h (CALLER_INTERWORKING_SLOT_SIZE): Likewise.
	* config/powerpcspe/aix.h (STACK_DYNAMIC_OFFSET): Likewise.
	* config/powerpcspe/darwin.h (STACK_DYNAMIC_OFFSET): Likewise.
	* config/powerpcspe/powerpcspe.h (STACK_DYNAMIC_OFFSET): Likewise.
	* config/rs6000/aix.h (STACK_DYNAMIC_OFFSET): Likewise.
	* config/rs6000/darwin.h (STACK_DYNAMIC_OFFSET): Likewise.
	* config/rs6000/rs6000.h (STACK_DYNAMIC_OFFSET): Likewise.
	* dojump.h (saved_pending_stack_adjust): Change x_pending_stack_adjust
	and x_stack_pointer_delta from int to poly_int64.
	* dojump.c (do_pending_stack_adjust): Update accordingly.
	* explow.c (allocate_dynamic_stack_space): Handle polynomial
	stack_pointer_deltas.
	* function.c (STACK_DYNAMIC_OFFSET): Add a cast to poly_int64.
	(pad_to_arg_alignment): Track polynomial offsets.
	(assign_parm_find_stack_rtl): Likewise.
	(assign_parms, locate_and_pad_parm): Handle polynomial argument sizes.
	* toplev.c (output_stack_usage): Update reference to
	current_function_pushed_stack_size.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r255921

1 files changed, 4 insertions, 4 deletions

diff --git a/gcc/config/m68k/m68k.c b/gcc/config/m68k/m68k.c
index a0fab4c0bb4..10c78153e64 100644
--- a/gcc/config/m68k/m68k.c
+++ b/gcc/config/m68k/m68k.c
@@ -178,7 +178,7 @@ static bool m68k_return_in_memory (const_tree, const_tree);
 #endif
 static void m68k_output_dwarf_dtprel (FILE *, int, rtx) ATTRIBUTE_UNUSED;
 static void m68k_trampoline_init (rtx, tree, rtx);
-static int m68k_return_pops_args (tree, tree, int);
+static poly_int64 m68k_return_pops_args (tree, tree, poly_int64);
 static rtx m68k_delegitimize_address (rtx);
 static void m68k_function_arg_advance (cumulative_args_t, machine_mode,
 				       const_tree, bool);
@@ -6531,14 +6531,14 @@ m68k_trampoline_init (rtx m_tramp, tree fndecl, rtx chain_value)
    standard Unix calling sequences.  If the option is not selected,
    the caller must always pop the args.  */
 
-static int
-m68k_return_pops_args (tree fundecl, tree funtype, int size)
+static poly_int64
+m68k_return_pops_args (tree fundecl, tree funtype, poly_int64 size)
 {
   return ((TARGET_RTD
 	   && (!fundecl
 	       || TREE_CODE (fundecl) != IDENTIFIER_NODE)
 	   && (!stdarg_p (funtype)))
-	  ? size : 0);
+	  ? (HOST_WIDE_INT) size : 0);
 }
 
 /* Make sure everything's fine if we *don't* have a given processor.